// Auto-generated file. Do not edit!
//   Template: src/qs8-gemm/MRx4c16-wasmdot.c.in
//   Generator: tools/xngen
//
// Copyright 2023 Google LLC
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree.

#include <assert.h>

#include <wasm_simd128.h>

#include "xnnpack/gemm.h"
#include "xnnpack/math.h"

void xnn_qs8_qc8w_gemm_minmax_fp32_ukernel_1x4c16__wasmusdot(
    size_t mr,
    size_t nc,
    size_t kc,
    const int8_t* restrict a,
    size_t a_stride,
    const void* restrict w,
    int8_t* restrict c,
    size_t cm_stride,
    size_t cn_stride,
    const union xnn_qs8_qc8w_conv_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(mr != 0);
  assert(mr <= 1);
  assert(nc != 0);
  assert(kc != 0);
  assert(kc % sizeof(int8_t) == 0);
  assert(a != NULL);
  assert(w != NULL);
  assert(c != NULL);

  kc = round_up_po2(kc, 16 * sizeof(int8_t));
  const int8_t* a0 = a;
  int8_t* c0 = c;


  const v128_t vmagic_bias = wasm_f32x4_const_splat(12582912.0f);
  const int32_t output_min_less_zero_point = (int32_t) params->fp32_scalar.output_min - (int32_t) params->fp32_scalar.output_zero_point;
  const v128_t vmagic_min = wasm_i32x4_splat((int32_t) float_as_uint32(12582912.0f + output_min_less_zero_point));
  const v128_t vmagic_bias_less_output_zero_point = wasm_i32x4_splat(INT32_C(0x4B400000) - (int32_t) params->fp32_scalar.output_zero_point);
  const v128_t voutput_max = wasm_i8x16_splat(params->fp32_scalar.output_max);
  XNN_FORCE_REALIZATION(vmagic_bias);
  XNN_FORCE_REALIZATION(vmagic_min);
  XNN_FORCE_REALIZATION(vmagic_bias_less_output_zero_point);
  XNN_FORCE_REALIZATION(voutput_max);

  const v128_t vsign_mask = wasm_u8x16_const_splat(UINT8_C(0x80));
  do {
    v128_t vacc0x0 = wasm_v128_load32_zero(w);
    v128_t vacc0x1 = wasm_v128_load32_zero((const int32_t*) w + 1);
    v128_t vacc0x2 = wasm_v128_load32_zero((const int32_t*) w + 2);
    v128_t vacc0x3 = wasm_v128_load32_zero((const int32_t*) w + 3);
    w = (const int32_t*) w + 4;

    size_t k = kc;
    do {
      const v128_t va0 = wasm_v128_xor(wasm_v128_load(a0), vsign_mask);
      a0 += 16;

      const v128_t vb0 = wasm_v128_load(w);

      vacc0x0 = wasm_i32x4_relaxed_dot_i8x16_i7x16_add(vb0, va0, vacc0x0);
      const v128_t vb1 = wasm_v128_load((const int8_t*) w + 16);

      vacc0x1 = wasm_i32x4_relaxed_dot_i8x16_i7x16_add(vb1, va0, vacc0x1);
      const v128_t vb2 = wasm_v128_load((const int8_t*) w + 32);

      vacc0x2 = wasm_i32x4_relaxed_dot_i8x16_i7x16_add(vb2, va0, vacc0x2);
      const v128_t vb3 = wasm_v128_load((const int8_t*) w + 48);

      vacc0x3 = wasm_i32x4_relaxed_dot_i8x16_i7x16_add(vb3, va0, vacc0x3);

      w = (const int8_t*) w + 64;
      k -= 16 * sizeof(int8_t);
    } while (k != 0);

    const v128_t vacc0x02 = wasm_i32x4_add(wasm_v32x4_shuffle(vacc0x0, vacc0x2, 0, 4, 1, 5), wasm_v32x4_shuffle(vacc0x0, vacc0x2, 2, 6, 3, 7));
    const v128_t vacc0x13 = wasm_i32x4_add(wasm_v32x4_shuffle(vacc0x1, vacc0x3, 0, 4, 1, 5), wasm_v32x4_shuffle(vacc0x1, vacc0x3, 2, 6, 3, 7));

    v128_t vacc0x0123 = wasm_i32x4_add(wasm_v32x4_shuffle(vacc0x02, vacc0x13, 0, 4, 1, 5), wasm_v32x4_shuffle(vacc0x02, vacc0x13, 2, 6, 3, 7));

    vacc0x0123 = wasm_f32x4_convert_i32x4(vacc0x0123);

    const v128_t vscale0123 = wasm_v128_load(w);
    w = (const float*) w + 4;
    vacc0x0123 = wasm_f32x4_mul(vacc0x0123, vscale0123);

    vacc0x0123 = wasm_f32x4_add(vacc0x0123, vmagic_bias);

    vacc0x0123 = wasm_i32x4_max(vacc0x0123, vmagic_min);

    vacc0x0123 = wasm_i32x4_sub(vacc0x0123, vmagic_bias_less_output_zero_point);

    v128_t vacc00x0123 = wasm_i16x8_narrow_i32x4(vacc0x0123, vacc0x0123);

    v128_t vacc = wasm_i8x16_narrow_i16x8(vacc00x0123, vacc00x0123);

    vacc = wasm_i8x16_min(vacc, voutput_max);

    if XNN_LIKELY(nc >= 4) {
      wasm_v128_store32_lane(c0, vacc, 0);

      c0 = (int8_t*) ((uintptr_t) c0 + cn_stride);

      a0 = (const int8_t*) ((uintptr_t) a0 - kc);

      nc -= 4;
    } else {
      if (nc & 2) {
        wasm_v128_store16_lane(c0, vacc, 0);
        c0 += 2;

        vacc = wasm_u32x4_shr(vacc, 16);
      }
      if (nc & 1) {
        wasm_v128_store8_lane(c0, vacc, 0);
      }

      nc = 0;
    }
  } while (nc != 0);
}